Elevator



March 25, 1930. J. BERGSTEN ELEVATOR Filed Feb- 4, 1924 INVENTOR, efysfen;

` :lohn

ArT'oRNEYs.

Patented Mar. 25, 1930 PATENT OFFICE :01m TEN, or Hmosa Banen, canmonma ELEVATOB application mea February 4, 1924.V serial ne. 690,347.

An object of the present invention is to lo providev an elevator with positive locking means which cannot be accidentally disturbed or unlatched or unlocked, due to jarring or a disturbance of the parts carried by the ele vator, but which can only be unlocked bg an l operator intentionally operating the latc ing means.

-With the above and other objects in view the inventionontemplates an improved elevator which is so formed andconstructed as to provide a resistance to stress and strain and which ositively ensures a locked relation of the varlous parts when the same is embracing work.v

In the drawing:

Fi re 1 is a fragmentary side elevation, certain parts being in section, of the improved elevator;

Figure 2 is a plan view, partly in section, on the line 2-2 of Figure 1, and illustrating the improved locking means associated with the elevator;

Figure 3 is a fragmentary enlarged view partly insection and taken on the line 3-3 of Figure 2;

s Figure 4 is a fragmentary view partly in section and on the line 4-4 ofFigure 5, and

in the plane of Figure 1 illustrating the cooperating parts of the body and the-jaw or gate and the latching means; and,

Figure 5 is a fragmentary enlarged view of the 'locking means shown in Figure 2.

Corresponding parts in all the figures are designated by the same reference characters.

Referring with particularity to the drawing, the improved elevator'as a whole is designated by A, of which a is the body and b the gate. In the present elevator the body member a is provided with diametrically disu posed extensions designated generally by c, which extensions are formed so that a bail d may be associated therewith. The so-called extensions c in the present showing. com rise two spaced members 1 and 2 for each si e of the elevator body. The members 1 are adapted to cooperate with the bail i which com- 55 i prises two members 3 and 4. The load or weight of the elevator plus anyV article or device carried by theelevator `is supported b the bail plus a suitable tackle associated wit the bail. To ensure that the bail does not become disconnected from the' elevator body I provide the means e which comprises stirruplike members pivoted to the extensions 2 and provided with releasable catches 5 adapted toengage with thev extensions 1. The por- 05 tions 6 of such stirrup-like members are bored as shown at 7 so as to confine a spring-actuated catch or bolt 8 to which is joined a iinger-piece or head 9, and each extension is recessed as shown at 10 to confine a portion of 70 'i the bolt 8 when'the stirrup-like member is revolved so as to straddle the space between the members 1 and 2. It is thus yseen that the bail is positively retained upon the extensions 1. 7,5 The body may be curved as shown at 20 and the gate is correspondingly curved as shown at 21 so that the normal space between the body and the gate is circular.` The gate may be hinged to the body as'shown at 22. To 30 this end the body is provided with a series of spaced knuckles 23. 24 and 25, between which knuckles 26 and 27 of the gate are placed, and the usual pin 28 passed through aligned bores in such knuckles of the gate and body. One of the main features of this elevator resides in the positive latching means designated by f for ensuring a proper closing of the gate to the body. Said latching means includes a lever 40 and a bolt 41. In the 90 embodiment shown the bolt is carried by the gate being received in a bore 42 of .such gate b. The body a is formed with an extension 43 which is rovided with a bore 44 adapted to align witih closedto the bod as illustrated in full lines at Figure y2. e gate b is constructed to totally confine the lever 40 for actuating the f. bolt 41 whenthe. gate and the body are c osed sopgas toembrace some object, and this conthe bore 42 when the gate is 95 struction ensures that the lever 40will not be disturbed by extraneous objects hittin the gate and Swingin thelever 40 to unlatc the gate from the bo y. This desired. result is accomplished in the present invention by enlarging the head of the gate as shown at 45, and so that a portion of such head 1s formed with two spaced flanges 46 and 47. .At this point it is obvious that in place of providing flanges I might provide the equivalent by recessin the enlarged head, which of course woid form flanges. These flanges extend a distancesuiiiciently outwardly from the outer surface of the gate to totally receive therebetween the lever 40 when the gate and body are in closed relation. rlhe gate and body are likewise formed to have a stressresisting relation when locked together, and this stress-resisting relation is accomplished by recessing the body to provide a mortised seat as shown at 100 so that a tenon projectlon or extension 48 on the end of the gate a may be received within such recessed portion as illustrated in Figures 2, 4 and 5. lt will be noted that the recess 100 forms two shouldered portions in the body, as shown at 49 and 50, and the shouldered portions cooperate with the extension 48 and further that both of suchk shouldered portions are curved to conform to the inner curvature 20 of the body. The extension 43 extends at right angles to the parts c in the showing and such extension would have its wall portion 51 cooperate with the portion .52 of the gate. Thus any strain imposed upon the gate would tend to force the portion 52 of such gate against the wall 51, but this movement would in a measure be resisted by the part 48 contacting with the wall surrounding the recess 100 1n the body. Likewise movement in an inward direction would be resisted by the extension 48 contacting with the flanges 49 and 50 of the body..

Of course the latching means ,f could be oiany form other than that shown in the drawing, the main point being to so confine the latching means, and particularly the member for actuating the latching means, as to prevent such latching means from being accidentally opened, due to the elevator striking extraneous objects. The present latching means, and particularly the handle member there,-is so formed that an operator would have to intentionally operate the same in order to unlatch the gate from the body. The bolt 41 may be transversely recessed, as shown at for reception of a head portion 61 of the lever or arm 40, and preferably the hea'd 61 extendspartially within the recess 60 so as to allow play of the head within such recess. The lever is pivoted as shown at 62 between the flanged portions of the gate, and an end of such lever is provided with a T handle 63. Thus, an operator may reach between the flanges 46 and 47, and the fingers may close upon the T handle 63 and by swinging 'the lever outwardly, as shown in Figure 5, retract-the bolt 41 within the bore of the gateand 'a further pull upon the lever will allow the gate to swing open from the body. I provide a coil spring 64 between an end of the bolt 41 'and the gate so as to at all times normally tend to force the bolt outwardly from the bore 42 in the gate', and said bolt is likewise provided with a bevel nose portion 65 sfo that a swinging of the ate inwardly will automatically retract the olt lwhen the nose portioncontacts with a bevel portion 66 of the extension 43 to where the olt may be passed under spring actuation within the bore 44 of the extension 43 to lock the gate zto the body. As shown in Figure 3 I may provide two of such springs 64, spaced apart, to force the bolt into locking engagement with the body.

It will thus be seen thtin the present invention I have provided positive locking means for holding the bail to the body, as well as providing a stress-resisting Jformation between the body and the gate with a latching mechanism which cannot be disturbed except intentionally by an operator.

It is obvious that various changes and modifications may be made in practicing the invention, in departure from the particular showing, without departing from the true spirit ofthe invention.'

Having thus disclosed my invention, l claim and desire to secure by Letters Patent:

1. A casing elevator comprising a body element, a gate elem'ent hinged to said body element for movement between open and closed positions with respect thereto, a lug on one of said elements, the other of said elements having a recess to receive and completely surround said lug when said gate element is closed whereby said gate element is held against movement relative to the body element in all directions transversely of said lug, and means to hold said gate, element closed.

2. A casing elevator comprising a body element, a gate element hinged to said body element for movement between open and closed positions with respect thereto, lug and recess formations on said elements, respectively, cooperating to hold said elements against movement relative to one another in all directions transversely of said formations when said gate element is in closed position, and latch means entirely independent of said formations to hold said gate element in closed position.

3. A casing elevator comprising a body element, a gate hinged to said body element for movement between open and closed positions with respect thereto, lug and recess formations on said element, respectively, cooperating to hold said elements against movement relative to one another in all directions transversely of said formations when said gate element is in closed position, an outwardly dirccted extension on said body element adjacent to the aforesaid formation thereof, said extension having a lock bolt receiving opening therein, a lock bolt slidably mounted in said gate element outwardly of the aforesaid formation thereof for engagement in the opening in said extension, and actuating means for said lock bolt.

4. A casing elevator comprising a body element, a gate hinged to said body element for movement between open and closed positions with respect thereto, lug and recess formations on said element, respectively, cooperating to hold said elements against movement relative to one another in all directions transversely of .said formations when said gate element is in closed position, an outwardly directed extension on said body element adjacent to the aforesaid formation thereof, said extension having a lock bolt receiving opening therein, a lock bolt slidably mounted in said gate element outwardly of the aforesaid' formation thereof for engagement in the opening in said extension, spring means for projecting said bolt into the opening in said extension when the gate is closed, and a pivoted lever operatively connected with said bolt for withdrawing same from said open- In testimony whereof, I have signed-my i name to this specification.

`JOHN BERGSTEN.' 

